A one-alarm fire occurred tonight in Hayes Valley at 609 Hayes St., the home of French restaurant Petit Crenn.

According to firefighters, no one was injured and no residents were displaced in the blaze, which began around 6:45pm. A Petit Crenn employee outside the restaurant told us that the cause of the fire was unclear, as it did not begin in the kitchen.

Petit Crenn staffers outside the restaurant.

Petit Crenn was open at the time of the fire and had to be evacuated, as did neighboring German restaurant Suppenkuche.

Many employees were waiting outside as firefighters fought the blaze, and while Suppenkuche eventually allowed diners and staff to return, it appears Petit Crenn has sustained significant water damage, and will be closed for the evening.

Diners outside Suppenkuche after it was evacuated.

thought i was finally going to eat at suppenkuche aaand then it caught on fire and we were evacuated 😬😬😬

The fire also caused transit disruptions in Hayes Valley, according to tipster Patrick C.

Petit Crenn, which opened in 2015, is owned by internationally renowned chef Dominique Crenn, who also owns the two-Michelin-starred Atelier Crenn in Cow Hollow. Prior to Crenn's takeover, it housed Bar Jules for eight years.

We'll continue to update this post as we receive more information.

Update, 9:53pm: Here's an update from Crenn on the restaurant's condition. She says there is "no damage," and that Petit Crenn is expected to reopen on Saturday.